Pharrell Williams is giving you a chance to own a piece of Grammy history. The “Happy” singer has put his famous hat up on the auction block.

The brown Vivienne Westwood “Mountain” hat that took the Grammys and social media by storm has gone up for sale on eBay. The auction started at $200 (the price he paid), and bidding has already soared past $10,000 with nine days to go and 64 bids so far.

All proceeds benefit Pharrell’s non-profit, One Hand to Another. Founded in 2008, the foundation’s mission is to support community centers and education through new technologies, arts, media, and motivation.

The auction ends March 2, the same day he performs “Happy” at the Oscars.